November 15th

• Schack August Steenberg Krogh was a Danish physiologist and zoologist who received the Nobel Prize for Physiology or Medicine in 1920 for his discovery of the motor-regulating mechanism of capillaries (small blood vessels).
• Working with frogs, which he injected with Indian ink shortly before the killing, he showed that in sample areas of resting muscle the number of visible (stained) capillaries was about 5 per square millimeter.
• Krogh’s research linked exercise physiology with nutrition and metabolism.